O-LevelPhysicsNuclear Physics5054/11 · May/June 2010 · Q391 Mark

When a sample of a radioactive nuclide decays, the count rate falls from 1200 to 150 in three minutes. What is the half-life of the radioactive nuclide?

A0.75 minutes

B1.0 minutes

C3.0 minutes

D9.0 minutes

✓ Correct answer

B: 1.0 minutes

Oracle Prep sorts past-paper questions by topic, so you can drill Nuclear Physics and see which topics are most likely to come up next.

Topic: Nuclear Physics, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, May/June 2010 Paper 1 Variant 1, question 39.

Questions and mark schemes are from past examination papers and remain the copyright of the exam board. How Oracle Prep builds its content

A radioactive nuclide ²³⁸₉₂U decays into thorium by emitting an alpha-particle. The thorium then decays into protacti…

Chlorine exists as two isotopes. One has a nucleon number (mass number) of 35 and the other has a nucleon number (mas…

The radioactive isotope radium-226 may be shown as ⁸⁸²²⁶Ra. How many protons does an atom of radium contain?

A resistor is marked with three coloured bands. Using the key provided, what is the resistance of the resistor?

The diagram shows part of a cathode-ray oscilloscope. Which particles are emitted by the cathode?

Each row contains a vector and a scalar. In which row is the size of the vector equal to the size of the scalar?